<template>
  <el-form ref="loginForm" :model="loginForm" :rules="loginRules" class="login-by-username">
    <el-form-item prop="username">
      <el-input v-model="loginForm.username" type="text" auto-complete="off" placeholder="账号">
        <svg-icon slot="prefix" icon-class="user" class="el-input__icon input-icon" />
      </el-input>
    </el-form-item>
    <el-form-item prop="password">
      <el-input
        v-model="loginForm.password"
        type="password"
        auto-complete="off"
        placeholder="密码"
        :type="showornot"
        @keyup.enter.native="handleLogin"
      >
        <svg-icon slot="prefix" icon-class="password" class="el-input__icon input-icon" />
        <svg-icon slot="suffix" :icon-class="showeye?'preview-close':'preview-open'" @click="isShow"/>
      </el-input>
    </el-form-item>
    <el-form-item prop="code" v-if="captchaOnOff">
      <el-input
        v-model="loginForm.code"
        auto-complete="off"
        placeholder="验证码"
        style="width: 63%"
        @keyup.enter.native="handleLogin"
      >
        <svg-icon slot="prefix" icon-class="validCode" class="el-input__icon input-icon" />
      </el-input>
      <div class="login-code">
        <img :src="codeUrl" @click="getCode" class="login-code-img"/>
      </div>
    </el-form-item>
    <div style="display: flex; justify-content: space-between">
      <el-checkbox v-model="loginForm.rememberMe" style="margin:0px 0px 25px 0px;">记住密码</el-checkbox>
      <my-link @to="toForgotPassword"  style="padding-bottom: 10px; font-size: 14px;color: #606266;">忘记密码</my-link>
    </div>

    <el-form-item style="width:100%;">
      <el-button
        :loading="loading"
        size="medium"
        type="primary"
        style="width:100%;"
        @click.native.prevent="handleLogin"
      >
        <span v-if="!loading">登 录</span>
        <span v-else>登 录 中...</span>
      </el-button>
    </el-form-item>
  </el-form>
</template>
<script>
  import Cookies from "js-cookie";
  import { encrypt, decrypt } from '@/utils/jsencrypt'
  import MyLink from '@/components/MyLink/index'

  export default {
    name: "LoginByUsername",
    components: { MyLink },
    data() {
      return {
        loginForm: {
          username: "",
          password: "",
          rememberMe: false,
          code: "",
          uuid: "",
        },
        loginRules: {
          username: [
            { required: true, trigger: "blur", message: "用户名不能为空" }
          ],
          password: [
            { required: true, trigger: "blur", message: "密码不能为空" }
          ],
          code: [{ required: true, trigger: "change", message: "验证码不能为空" }]
        },
        loading: false,
        captchaOnOff: true,
        redirect: undefined,
        showornot:"password",
        showeye:true,
      };
    },
    watch: {
      $route: {
        handler: function(route) {
          this.redirect = route.query && route.query.redirect;
        },
        immediate: true
      }
    },
    computed:{
      codeUrl(){
        return `${process.env.VUE_APP_BASE_API}/api/accounts/image_codes/${this.loginForm.uuid}.jpg`
      },
    },
    created() {
      this.loginForm.password = process.env.NODE_ENV === 'production'?``:`admin@123`
      this.getCode();
      this.getCookie();
    },
    methods: {
      isShow(){//点击切换眼睛
        this.showeye = !this.showeye;
        if (this.showeye === true) {
          this.showornot = "password";
        } else {
          this.showornot = "text";
        }
      },
      toForgotPassword(){
        this.$router.push({path:"/forgotPassword"})
      },
      getCode() {
        this.generateUUID()
      },
      generateUUID() {
        let d = new Date().getTime();
        if (window.performance && typeof window.performance.now === "function") {
          d += performance.now(); //use high-precision timer if available
        }
        let uuid = 'xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx'.replace(/[xy]/g, function (c) {
          let r = (d + Math.random() * 16) % 16 | 0;
          d = Math.floor(d / 16);
          return (c == 'x' ? r : (r & 0x3 | 0x8)).toString(16);
        });
        this.loginForm.uuid = uuid;
      },
      getCookie() {
        const username = Cookies.get("username");
        const password = Cookies.get("password");
        const rememberMe = Cookies.get('rememberMe')
        this.loginForm = {
          username: username === undefined ? this.loginForm.username.trim() : username,
          password: password === undefined ? this.loginForm.password.trim() : password,
          rememberMe: rememberMe === undefined ? false : Boolean(rememberMe),
          uuid:this.loginForm.uuid
        };
      },
      handleLogin() {
        this.$refs.loginForm.validate(valid => {
          if (valid) {
            this.loading = true;
            if (this.loginForm.rememberMe) {
              Cookies.set("username", this.loginForm.username, { expires: 30 });
              Cookies.set("password", this.loginForm.password, { expires: 30 });
              Cookies.set('rememberMe', this.loginForm.rememberMe, { expires: 30 });
            } else {
              Cookies.remove("username");
              Cookies.remove("password");
              Cookies.remove('rememberMe');
            }
            this.$store.dispatch("user/Login", this.loginForm).then(() => {
              this.$router.push({ path: this.redirect || "/" }).catch(()=>{});
            }).catch(() => {
              this.loading = false;
              if (this.captchaOnOff) {
                this.getCode();
              }
            });
          }
        });
      }
    }
  };
</script>
<style lang="scss" scoped>
  .login-by-username{
    height: 300px;
  }
  .el-input {
    height: 38px;
    input {
      height: 38px;
    }
  }
  .input-icon {
    height: 39px;
    width: 14px;
    margin-left: 2px;
  }
  .login-tip {
    font-size: 13px;
    text-align: center;
    color: #bfbfbf;
  }
  .login-code {
    width: 33%;
    height: 38px;
    float: right;
    img {
      cursor: pointer;
      vertical-align: middle;
    }
  }
  .el-login-footer {
    height: 40px;
    line-height: 40px;
    position: fixed;
    bottom: 0;
    width: 100%;
    text-align: center;
    color: #fff;
    font-family: Arial;
    font-size: 12px;
    letter-spacing: 1px;
  }
  .login-code-img {
    height: 38px;
  }
</style>
